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DC Generators

DC Generators
In case of dc machines, mechanical losses are primary function of

Voltage
Speed
None of the listed here
Current

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DC Generators
The terminal voltage of a series generator is 150 V when the load current is 5 A. If the load current is increased to 10 A, the terminal voltage will be

150 V
None of these
Greater than 150 V
Less than 150 V

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DC Generators
The O. C. C. of a dc generator is also called its_______ characteristic.

Internal
No load saturation
Performance
External

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DC Generators
If a self excited D.C. generator after being installed, fails to build up on its first trial run, the first thing to do is to

increase the speed of primemover
check armature insulation resistance
increase the field resistance
reverse the field connections

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DC Generators
The real working part of a dc machine is the ______

Armature winding
Commutator
None of the listed here
Field winding

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DC Generators
If the value of shunt field resistance of a shunt generator is greater than the critical resistance, the generator will

Excite to full voltage
Excite to one half of full voltage
Fail to excite
None of the listed here

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